Next year, taxpayers will fork over nearly $10 billion more to cover double-digit premium hikes for subsidized health insurance under the ACA, according to a study from the Center for Health and Economy. The study estimates that the cost of premium subsidies under the ACA will rise from $32.8 billion currently to $42.6 billion. Under current law, “you get a premium increase, you pour more money in,” said economist Douglas Holtz-Eakin, founder of the Center for Health and Economy. “The concern is that will feed more premium increases.” If the health care law is repealed next year, it is still yet to be seen what the remaining carriers participating in the ACA exchanges will do in 2018. It is also unclear how supportive Congress will be for subsidies going into a system slated to disappear.